CN106098123A - A kind of threeway component internal face temperature measurement system for nuclear power station and method - Google Patents

A kind of threeway component internal face temperature measurement system for nuclear power station and method Download PDF

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Publication number
CN106098123A
CN106098123A CN201610025498.6A CN201610025498A CN106098123A CN 106098123 A CN106098123 A CN 106098123A CN 201610025498 A CN201610025498 A CN 201610025498A CN 106098123 A CN106098123 A CN 106098123A
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China
Prior art keywords
temperature
internal face
pipe
supervisor
fluid
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Inventor
凌君
何大宇
刘洪涛
章贵和
孟阿军
刘浪
陈蓉
刘新
王骄亚
彭华清
毛庆
王海军
刘其寿
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China Nuclear Power Engineering Co Ltd
Xian Jiaotong University
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China Nuclear Power Engineering Co Ltd
Xian Jiaotong University
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Priority to CN201610025498.6A priority Critical patent/CN106098123A/en
Publication of CN106098123A publication Critical patent/CN106098123A/en
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/017—Inspection or maintenance of pipe-lines or tubes in nuclear installations
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/02—Devices or arrangements for monitoring coolant or moderator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

The invention discloses a kind of threeway component internal face temperature measurement system for nuclear power station and method, described system includes: fluid information measurement module, for measuring supervisor and penetrating temperature and the flow rate information of pipe upstream fluid；Function sets up module, for setting up the master of threeway component internal face temperature of zero dimension and threeway component, penetrating the first function of pipe flow speed ratio relation, with supervisor's fluid temperature (F.T.), the second function of penetrating pipe fluid temperature and internal face temperature relation；Internal face temperature computation module, for receiving the supervisor that fluid information measurement module is measured and temperature and the flow rate information of penetrating pipe upstream fluid, calls function and sets up the first function and the second function that module is set up, calculate and obtain internal face temperature.The present invention is responsible for and penetrates the interaction impact of fluid under different in flow rate ratio between pipe by analysis, structure is responsible for, is penetrated function of pipe flow speed ratio and certain some inner wall temperature and sets up module, after obtaining flow velocity and the fluid information being responsible for and penetrating pipe, solve its inner wall temperature information.

Description

A kind of threeway component internal face temperature measurement system for nuclear power station and method
Technical field
The present invention relates to the technical field of three-port structure internal information monitoring, particularly relate to a kind of threeway for nuclear power station Component internal face temperature measurement system and method.
Background technology
Reactor safety injection system and chemistry volume control system exist and fills the threeway components such as ozzle, these components Jet is respectively with 45 ° or 90 ° of inclination angle incidence main flows.Being vigorously mixed and between turbulent jet between incident fluid and main fluid The bigger transient state temperature difference makes the heat exchange between component and fluid very violent, and then makes component frequently bear thermal shock, causes The temperature of metal pipe-wall radially, axially, circumference uneven distribution, produce thermal stress induction heat exhaustion phenomenon.In actual work Cheng Zhongwei avoids pipeline thermal fatigue failure occur, needs fatiguability sensitizing range is carried out on-line condition monitoring.As heat exhaustion The basis of monitoring, it is necessary first to understand metal pipe-wall temperature temperature when occurring different fluid temperature and speed to mix in above-mentioned parts The Changing Pattern of degree field.
When rate of flow of fluid is higher, at interflow, cold fluid and hot fluid just starts fully to mix, and the fluid temperature (F.T.) mixing region is sent out Raw acute variation, thus cause this region or downstream line heat exhaustion, form thermal shock, as shown in Figure 1.When rate of flow of fluid is relatively low Time, owing to the density under water different temperatures is different and action of gravity impact, at interflow, horizontal segment can be initially formed cold fluid and hot fluid Layering, just can occur to mix completely, as shown in Figure 2 after a segment distance.Visible, when being responsible for different with penetrating pipe flow speed, to stirring The impact of Hun Qu and pipe downstream is also not quite similar.
In the prior art, the FatiguePro system of U.S. EPRI exploitation is to apply wider fatigue monitoring system at present System, as shown in Figure 3.
Online fatigue monitoring is carried out, although engineering construction cost can be reduced, it is also possible to reduce based on power plant's available data Maintenance cost, but there are some more significantly technological deficiencies in it:
One, range of application is limited
1), the general loop of nuclear power plant only have 6 temperature elements, only rely on its 6 temperature datas be difficult to effectively take into account Subsidiary conduit and the cold and hot region crossed of main pipeline, such as safety injection system, spray system, Surge line piping etc.；
2), existing method is based on existing power plant transient state information, and finds the temperature matched in data base Information, but when there is unpredictable disturbance or event, the accuracy of former transmission function will decline even complete failure；
3), for the heap-type (such as reactor core, process system structure changes) in non-EPRI existing database, if before Experimental data base in the model that do not matches, then the method is the most inapplicable, need to re-establish mathematical model and therewith Corresponding transmission function.
Two, temperature data real-time and poor accuracy
1), the existing temperature element of primary Ioops typically use thermal resistance, relative thermal galvanic couple, its response time is poor；
2), generally, the temperature information of tube fluid is penetrated in very difficult confirmation, will cause under the accuracy of transfer function method Fall；
3), between primary Ioops point for measuring temperature and sensitizing range demand point, if there is also other three-way interfaces, restricting orifice, valve Doors etc., cause the accuracy transmitting function to decline too.
Summary of the invention
The present invention is directed to technical problem present in prior art, it is provided that a kind of threeway component internal face for nuclear power station Temperature measurement system and method, be responsible for and penetrate the interaction impact of fluid under different in flow rate ratio between pipe, structure by analysis The function make supervisor, penetrating pipe flow speed ratio and certain some inner wall temperature sets up module, is obtaining supervisor and is penetrating the flow velocity of pipe and fluid letter After breath, set up module according to the function of different sensitizing ranges, solve its inner wall temperature information.
The technical scheme that the present invention proposes with regard to above-mentioned technical problem is as follows:
The threeway component internal face temperature measurement system for nuclear power station of the present invention, this threeway component include supervisor and with What described supervisor crossed penetrates pipe, and includes:
Fluid information measurement module: for measuring described supervisor and penetrating temperature and the flow rate information of pipe upstream fluid；
Function sets up module: for setting up the master of threeway component internal face temperature of zero dimension and threeway component, penetrating pipe flow speed Ratio the first function of relation, with supervisor's fluid temperature (F.T.), penetrate the second function of pipe fluid temperature and internal face temperature relation；
Internal face temperature computation module: respectively with fluid information measurement module, function is set up module and is connected, is used for receiving stream Described supervisor that body information measurement module is measured and penetrate temperature and the flow rate information of pipe upstream fluid, calls function and sets up module and build The first vertical function and the second function, calculate and obtain described internal face temperature.
In the threeway component internal face temperature measurement system for nuclear power station of the present invention, described fluid information measures mould Block includes:
Temperature-measuring module, for measuring supervisor, penetrating pipe upstream relative to fluid temperature (F.T.) T of supervisor at stability regionoWith penetrate Fluid temperature (F.T.) T of pipei；
Flow-speed measurement module, is used for measuring supervisor, penetrating pipe upstream relative to being responsible for inlet flow rate V at stability regionoWith penetrate pipe Inlet flow rate Vi。
In the threeway component internal face temperature measurement system for nuclear power station of the present invention, described function sets up module bag Include:
Temperature of zero dimension computing unit, for based on supervisor inlet flow rate VoWith penetrate tube inlet flow velocity ViNumerical value, calculates flow velocity Ratio VR, obtains corresponding temperature of zero dimension m in conjunction with CFD numerical computations.
In the threeway component internal face temperature measurement system for nuclear power station of the present invention, described threeway component internal face The master of temperature of zero dimension and threeway component, the first function penetrating pipe flow speed ratio relation be:
M=φ × VR,
Wherein, φ is the transmission function of each tired sensitive spot；VR=Vi/Vo。
In the threeway component internal face temperature measurement system for nuclear power station of the present invention, described supervisor's fluid temperature (F.T.), The second function penetrating pipe fluid temperature and internal face temperature relation is:
m = T - T o T i - T o ,
Wherein, the internal face temperature of certain point in T is threeway component.
In the threeway component internal face temperature measurement system for nuclear power station of the present invention, described flow-speed measurement module bag Include:
Ultrasonic flowmeter, the supervisor stiring and make muddy upstream, district being arranged in threeway component, penetrates outside the pipeline of pipe, is used for surveying Amount is responsible for, is penetrated pipe upstream relative to being responsible for inlet flow rate V at stability regionoWith penetrate tube inlet flow velocity Vi。
In the threeway component internal face temperature measurement system for nuclear power station of the present invention, described temperature-measuring module bag Include:
Thermocouple, the supervisor stiring and make muddy upstream, district being arranged in threeway component, penetrates outside the pipeline of pipe, is used for measuring master Manage, penetrate pipe upstream relative to fluid temperature (F.T.) T of supervisor at stability regionoWith fluid temperature (F.T.) T penetrating pipei。
In the threeway component internal face temperature measurement system for nuclear power station of the present invention, described internal face temperature computation Module includes:
Volume control technique computing unit, is used for using volume control technique, based on the node temperature on threeway component outer wall, in The node temperature of interbed, the node temperature on inwall, calculate the inner wall temperature information obtaining threeway component corresponding point.
The present invention the most correspondingly proposes the threeway component internal face thermometry for nuclear power station, including following step Rapid:
S1, obtain described supervisor and penetrate temperature and the flow rate information of pipe upstream fluid respectively；
S2, set up the master of threeway component internal face temperature of zero dimension and threeway component, jet velocity than the first of relation respectively Function, with supervisor's fluid temperature (F.T.), penetrate the second function of pipe fluid temperature and internal face temperature relation；
S3, according to described supervisor with penetrate pipe flow rate information and combine the first function, calculate and obtain described internal face dimensionless temperature Degree；
The temperature according to described supervisor and penetrating pipe upstream fluid, described internal face temperature of zero dimension and the second function calculate and obtain Obtain described internal face temperature.
Owing to, in the present invention program, the threeway component internal face temperature measurement system for nuclear power station includes: fluid is believed Breath measurement module, for measuring described supervisor and penetrating temperature and the flow rate information of pipe upstream fluid；Function sets up module, is used for building The master of vertical threeway component internal face temperature of zero dimension and threeway component, penetrate the first function of pipe flow speed ratio relation, with supervisor's fluid Temperature, penetrate the second function of pipe fluid temperature and internal face temperature relation；Internal face temperature computation module, respectively with fluid information Measurement module, function is set up module and is connected, for receiving the described supervisor of fluid information measurement module measurement and penetrating pipe upstream stream The temperature of body and flow rate information, call function and set up the first function and the second function that module is set up, calculate and obtain described inwall Surface temperature.The threeway component internal face temperature measurement system of the present invention and method can be before not destroying primary coolant circuit pipe structure Putting and know inner-walls of duct surface temperature distributed intelligence relatively accurately, the thermal stress for Fatigue Assessment calculates offer data input, The function that technical scheme sets up monitoring point based on CFD technology sets up module, only need to obtain main, to penetrate pipeline temperature and Flow information can calculate internal face temperature, is applicable to power plant's difference operating mode, including unexpected unusual service condition, fits too The transient changing caused for process system transformation and upgrade or transformation.
Accompanying drawing explanation
Fig. 1 is that cold fluid and hot fluid crosses at a high speed schematic diagram at three-port structure；
Fig. 2 is that cold fluid and hot fluid low speed at three-port structure crosses schematic diagram；
Fig. 3 is FatiguePro system data acquisition schematic diagram of the prior art；
The threeway component internal face temperature measurement system structural frames for nuclear power station that Fig. 4 provides for the embodiment of the present invention Figure；
The another kind of the threeway component internal face temperature measurement system for nuclear power station that Fig. 5 provides for the embodiment of the present invention Structured flowchart；
The threeway component internal face thermometry flow chart for nuclear power station that Fig. 6 provides for the embodiment of the present invention；
The another kind of the threeway component internal face thermometry for nuclear power station that Fig. 7 provides for the embodiment of the present invention Flow chart；
The three-port structure for nuclear power station that Fig. 8 embodiment of the present invention provides is responsible for, is penetrated pipe flow amount, temperature survey signal Figure；
Control in the threeway component internal face thermometry for nuclear power station that Fig. 9 provides for the embodiment of the present invention Volumetric method schematic diagram.
Detailed description of the invention
Embodiments provide a kind of threeway component internal face temperature measurement system for nuclear power station and method, can It is applied to nuclear power, thermoelectricity, petrochemical plant etc. there is hot and cold water and cross three-port structure region, indirectly obtains threeway and stir and make muddy district's inwall Surface temperature distributed intelligence, provides input data for Thermal Fatigue, it is also possible to as upstream line gate valve, the cut-off of three-port structure The auxiliary judgment instrument whether valve etc. leaks.
Embodiments providing a kind of threeway component internal face temperature measurement system and method, this threeway component includes Supervisor and penetrate pipe with described supervisor crosses, threeway component internal face temperature measurement system includes: fluid information measurement module 1, For measuring described supervisor and penetrating temperature and the flow rate information of pipe upstream fluid；Function sets up module 2, is used for setting up threeway component The master of internal face temperature of zero dimension and threeway component, penetrate the first function of pipe flow speed ratio relation, with supervisor's fluid temperature (F.T.), penetrate pipe flow Temperature and the second function of internal face temperature relation；Internal face temperature computation module 3, respectively with fluid information measurement module, Function set up module connect, for receive fluid information measurement module measure described supervisor and penetrate pipe upstream fluid temperature and Flow rate information, calls function and sets up the first function and the second function that module is set up, calculate and obtain described internal face temperature.
Visible, the present invention program is responsible for and penetrates the interaction shadow of fluid under different in flow rate ratio between pipe by analysis Ringing, structure is responsible for, is penetrated function of pipe flow speed ratio and certain some inner wall temperature and sets up module, is obtaining supervisor and is penetrating flow velocity and the stream of pipe After body information, set up module according to the function of different sensitizing ranges, solve its inner wall temperature information.Primary Ioops can not destroyed Knowing inner-walls of duct surface temperature distributed intelligence on the premise of pipeline configuration relatively accurately, the thermal stress calculating for Fatigue Assessment carries Input for data, and use the measured data of tested areas adjacent relatively to improve as input information, accuracy, the present invention program The function setting up monitoring point based on CFD technology sets up module, only need to obtain main, to penetrate pipeline temperature and flow information can calculate Internal face temperature, is applicable to power plant's difference operating mode, including unexpected unusual service condition, is applied equally to process system transformation The transient changing that upgrading or transformation cause.
In order to be better understood from technique scheme, below in conjunction with Figure of description and specific embodiment to upper State technical scheme to be described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment is to the application The detailed description of technical scheme rather than the restriction to technical scheme, in the case of not conflicting, the present invention implements Technical characteristic in example and embodiment can be mutually combined.
Refer to Fig. 4, the embodiment of the present application provides a kind of threeway component internal face temperature survey system for nuclear power station System, including:
Fluid information measurement module 1: for measuring described supervisor and penetrating temperature and the flow rate information of pipe upstream fluid.
Further, as it is shown in figure 5, the fluid information measurement module 1 of the present invention includes:
Temperature-measuring module 11, for measuring supervisor, penetrating pipe upstream relative to fluid temperature (F.T.) T of supervisor at stability regionoWith Penetrate fluid temperature (F.T.) T of pipei；
Flow-speed measurement module 12, is used for measuring supervisor, penetrating pipe upstream relative to being responsible for inlet flow rate V at stability regionoWith penetrate Tube inlet flow velocity Vi。
Function sets up module 2: for setting up the master of threeway component internal face temperature of zero dimension and threeway component, penetrating pipe flow speed Ratio the first function of relation, with supervisor's fluid temperature (F.T.), penetrate the second function of pipe fluid temperature and internal face temperature relation.For horizontal stroke To jet, ρiVi/ρoVoIt is the momentum flux ratio of jet and main flow, represents momentum and the master of jet in unit interval, unit are The momentum ratio of stream.If jet uses same fluid, without density contrast, now, velocity ratio identical meaning jet and master with main flow The momentum flux ratio of stream is identical, is equivalent to jet identical with the situation of main flow interphase interaction, and i.e. velocity ratio is identical, master props up During pipe flow speed difference, the mobility status difference in threeway component is less, and this sets up the theoretical basis of module for function.
Internal face temperature computation module 3: respectively with fluid information measurement module 1, function is set up module 2 and is connected, and is used for connecing Receive the described supervisor that fluid information measurement module 1 is measured and temperature and the flow rate information of penetrating pipe upstream fluid, call function and set up First function of module 2 foundation and the second function, calculate and obtain described internal face temperature.
Further, refer to Fig. 5, described function is set up module 2 and is included:
Temperature of zero dimension computing unit 21, for based on supervisor inlet flow rate VoWith penetrate tube inlet flow velocity ViNumerical value, calculates stream Speed ratio VR, obtains corresponding temperature of zero dimension m in conjunction with CFD numerical computations.
To near wall variations in temperature quantitative analysis, use supervisor's fluid temperature (F.T.), penetrate pipe fluid temperature and internal face temperature pass Second function of system represents: T=m (Ti-TO)+T0, namely:
m = T - T o T i - T o - - - ( 1 )
In formula:
The internal face temperature of certain point, K in T threeway component；
T0Supervisor's fluid temperature (F.T.), K；
TiJet pipe fluid temperature (F.T.), K.
When m is 0, near wall, temperature is identical with supervisor's temperature of incoming flow, and wall is not by thermal shock；When m is 1, closely At wall, temperature is identical with jet pipe fluid temperature (F.T.), and the thermal shock that wall is subject to is maximum, and the thermal stress thus caused is the highest.
In specific implementation process, the master of described threeway component internal face temperature of zero dimension and threeway component, penetrate pipe flow speed Than the first function of relation it is:
m = T - T o T i - T o = φ × V R
In formula,
VR: velocity ratio is defined as VR=Vi/Vo；
ViPenetrate tube inlet flow velocity, m/s；
VoSupervisor's inlet flow rate, m/s；
The transmission function of each tired sensitive spot of φ.
Further, refer to Fig. 5 and Fig. 8, flow-speed measurement module 11 includes:
Ultrasonic flowmeter 80, the supervisor stiring and make muddy upstream, district being arranged in threeway component, penetrates outside the pipeline of pipe, is used for Measure supervisor, penetrate pipe upstream relative to being responsible for inlet flow rate V at stability regionoWith penetrate tube inlet flow velocity Vi.If being responsible for or penetrating pipe upstream There is flow transducer in straight length region, and this flow transducer to threeway is stired and make muddy not exist between district and affected flowing field stability (such as there are other three-port structure or restricting orifices etc.) in other factors, then directly invokes this flow (flow velocity) signal and no longer set Put effusion meter；If supervisor, penetrating pipe upstream and cannot obtain rate of flow of fluid signal, then stiring and make muddy upstream, district 5D～10D (D represents caliber) A pair transit-time ultrasonic flow meter 80 of each layout, On-line sampling system fluid flow information outside pipeline.
Further, refer to Fig. 5 and Fig. 8, temperature-measuring module 12 includes:
Thermocouple 90, the supervisor stiring and make muddy upstream, district being arranged in threeway component, penetrates outside the pipeline of pipe, is used for measuring master Manage, penetrate pipe upstream relative to fluid temperature (F.T.) T of supervisor at stability regionoWith fluid temperature (F.T.) T penetrating pipei.If supervisor or to penetrate pipe upstream straight There is temperature sensor in pipeline section region, and this stream temperature sensor to threeway is stired and make muddy not exist between district and affected flowing field stability (such as there are other three-port structure or thermal stratifications etc.) in other factors, then directly invokes this temperature signal and no longer arrange temperature Degree sensor；If supervisor, penetrating pipe upstream and cannot obtain fluid temperature signal, then stiring and make muddy upstream, district 5D～10D (D represents caliber) Outside pipeline, each layout one circle thermocouple 90, uses volume control technique to solve the inner wall temperature information of pipeline corresponding point.
In specific implementation process, obtain supervisor, penetrate and flow at stability region relatively, pipe upstream 5D～10D (D represents caliber) Temperature (the T of bodyoAnd Ti) and flow velocity (VoAnd Vi) information；
Calculate velocity ratio VR=Vi/Vo, in conjunction with the m-VR curve of certain point that CFD numerical computations obtains, obtain the nothing of its correspondence Dimension temperature value.
According toAnd have learned that supervisor and penetrate fluid temperature (F.T.) T of pipeoAnd Ti, it is calculated the internal face of certain point Temperature value T.
Further, refer to Fig. 5 and Fig. 9, internal face temperature computation module 3 includes:
Volume control technique computing unit 31, is used for using volume control technique, based on the node temperature on threeway component outer wall, The node temperature in intermediate layer, the node temperature on inwall, calculate the inner wall temperature information obtaining threeway component corresponding point.
Further, described volume control technique is as follows:
Temperature Distribution depends on three nodes of radial direction: the node on outer wall, the node in intermediate layer, the joint on inwall Point.The feature of the method is, in order to determine the Temperature Distribution of [1] [4], needs to measure [3] [1], [3] [2], [3] [3], [3] [4], [3] [5], [3] [6], the temperature of [3] [7].Node [3] [1], [3] [2], [3] [3], [3] [4], [3] [5], [3] [6], [3] [7] are positioned at the outer wall of easily measurement, measure temperature by installing thermocouple.According to boundary condition, it is known that q [3] [1], q [3] [2], q [3] [3], q [3] [4], q [3] [5], q [3] [6], q [3] [7] be 0, wherein q [3] [1], q [3] [2] Deng representing the heat exchange amount between environment and outer wall respectively.In order to determine that the temperature of the whole cross section including inner surface is divided Cloth, the method that have employed inverse space propultion.Volume control technique, row energy conservation equation is used in exterior surface area.
For T [1] [4], first build the thermal change of the volume unit time of node [3] [3] and the volume of [3] [2] The thermal change of unit interval, the heat that the volume unit time of [2] [3] transmits to [3] [3], [3] [4] volume unit time Between heat and the external world preservation of energy equation to the heat that outer wall node [3] [3] transmits that transmits to [3] [3]；
Build the thermal change of the volume unit time of node [3] [4] and the heat of the volume unit time of node [3] [3] Amount change, heat that the volume unit time of node [2] [4] transmits to node [3] [4], node [3] [5] volume unit time Between heat and the external world preservation of energy equation to the heat that outer wall node [3] [4] transmits that transmits to node [3] [4]；
In like manner build the preservation of energy equation of node [3] [5]；
Wherein, node [3] [3], node [3] [4] and the thermal change of node [3] [5] respective volume unit time Can be derived by heat energy formula Q=cm Δ t；The heat of transmission can be obtained by fourier formula.
By build preservation of energy equation obtain T [2] [3], T [2] [4], T [2] [5] about T [3] [2], T [3] [3], T [3] [4], the expression formula of T [3] [5].
Then, thermal change and the volume unit time of node [2] [3] of the volume unit time of node [2] [4] are built Heat that the heat that transmits to node [2] [4], the volume unit time of node [3] [4] transmit to node [2] [4], node [2] [5] heat that the volume unit time transmits to node [2] [4] and the volume unit time of [1] [4] energy to [2] [4] Conservation equation.
Thus, T [1] [4] is derived:
In formula,
The temperature value of T point；
R threeway element tunnel outer wall, intermediate layer and inwall are to the distance of threeway element tunnel axis；
Δ r pipeline outer wall and the half of inwall distance；
The thermal diffusivity of alphatrons road material；
Angle；
The extraneous heat to outer wall transmission of q；
T time parameter.
Other T [1] [1], T [1] [2], T [1] [3], T [1] [5], T [1] [6], T [1] [7] inwall cake temperature permissible Same method is derived by.
Concrete, the temperature value of the required measuring point obtained according to CFD numerical simulation calculation (includes inner wall temperature, intermediate layer Temperature and outside wall temperature), by formula (1) i.e.Calculate different in flow rate than under temperature of zero dimension, then use Origin software sets up module according to calculated data fitting formula, the function obtaining correspondence.The letter of the most all monitoring points Number sets up module needs the method calculating function by numerical value to set up module, with the essence of FatiguePro system before system is run Distinguish as follows:
(1) data source for numerical computations is near zone measured data, the most accurately；
(2) to set up module versatility preferable for this function, can be suitable for main, penetrate pipeline different in flow rate ratio and stir and make muddy the wink caused State, including design transient, disturbance and other unusual service conditions；
(3) stir and make muddy area differentiation inside the threeway caused because of different in flow rate relatively big, different monitorings can be arranged as required to Point, is arranged in the weakness zones such as weld seam as far as possible.
It is pointed out that basis in the present embodimentAnd have learned that supervisor and penetrate fluid temperature (F.T.) T of pipeoWith Ti, it is calculated the internal face temperature value T of certain point, it may be necessary to use experimental technique to be verified.It addition, the CFD in literary composition (computational fluid dynamics) is computational fluid dynamics.
Based on same inventive concept, refer to Fig. 6, the embodiment of the present invention additionally provides a kind of threeway structure for nuclear power station Part internal face thermometry, comprises the following steps:
S1, obtain described supervisor and penetrate temperature and the flow rate information of pipe upstream fluid respectively；
S2, set up the master of threeway component internal face temperature of zero dimension and threeway component, jet velocity than the first of relation respectively Function, with supervisor's fluid temperature (F.T.), penetrate the second function of pipe fluid temperature and internal face temperature relation；
S3, according to described supervisor with penetrate pipe flow rate information and combine the first function, calculate and obtain described internal face dimensionless temperature Degree；
The temperature according to described supervisor and penetrating pipe upstream fluid, described internal face temperature of zero dimension and the second function calculate and obtain Obtain described internal face temperature.
In specific implementation process, refer to Fig. 7, step S1 of threeway component internal face thermometry includes sub-step Rapid:
S11, measurement are responsible for, are penetrated pipe upstream relative to the rate of flow of fluid (T of supervisor at stability region0) and penetrate the rate of flow of fluid of pipe (Ti)；
S12, measurement are responsible for, are penetrated pipe upstream relative to being responsible for inlet temperature (V at stability regiono) and penetrate tube inlet temperature (Vi)。
Described step S2 includes sub-step:
S21, based on supervisor inlet flow rate (Vo) and penetrate tube inlet flow velocity (Vi) numerical value, calculate velocity ratio (VR), in conjunction with CFD Numerical computations obtains corresponding temperature of zero dimension (m).
Described step S3 includes sub-step:
S31, employing volume control technique, based on the node temperature on threeway component outer wall, the node temperature in intermediate layer, inwall On node temperature, calculate obtain threeway component corresponding point inner wall temperature information.
As described above, above-mentioned threeway component internal face thermometry is applied to above-mentioned threeway component internal face Temperature measurement system, so, the enforcement principle of the method is embodied in said system, repeats the most one by one at this.
Sum it up, the present invention program can know three on the premise of not destroying primary coolant circuit pipe structure relatively accurately In logical element tunnel, cold fluid and hot fluid stirs and make muddy the internal face temperature distribution information in region, and the thermal stress for Fatigue Assessment calculates offer number According to input, the measured data of tested areas adjacent is used relatively to improve as input information, accuracy；Set up based on CFD technology The function of monitoring point sets up module, only need to obtain main, to penetrate pipeline temperature and flow information can calculate internal face temperature, can fit For power plant's difference operating mode, including unexpected unusual service condition, also agree to be applicable to process system transformation and upgrade or transformation causes Transient changing, it addition, upstream master, penetrate pipeline because of run need use gate valve or stop valve etc. dam time, in instrument channel The change of portion's temperature, the aid qualitatively judged as upstream line valve (gate valve, stop valve) leakage.
The threeway component internal face temperature measurement system for nuclear power station of the present invention and method are by leading, penetrating pipeline Thermocouple and the most online outer wall obtaining pipeline of effusion meter and internal fluid flow information are arranged in trip, stir and make muddy district as threeway The data source of internal face temperature analysis, real-time property and accuracy are relative to be improved；By arranging some thermoelectricity at pipeline external Even, use volume control technique, on the premise of not destroying main pipeline structure, inverting master, penetrate the internal face temperature of the stable section of pipeline Degree information；Based on momentum and law of conservation of energy, it is combined in that velocity ratio is identical and during primary branch flow velocity difference, in threeway component The less engineering experience of mobility status difference, proposes to set up function main, that penetrate between pipe flow speed ratio VR and temperature of zero dimension m and sets up Module, decouples various factors coupling problem, simplifies engineering calculation；Different monitoring points arranges different functions and sets up mould Block, is applicable to different operating modes, including unexpected abnormal transient state；The present invention may not only be applied to new implementation in power plant, equally may be used Upgrade for old repowering.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then can make other change and amendment to these embodiments.So, claims are intended to be construed to include excellent Select embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and the modification essence without deviating from the present invention to the present invention God and scope.So, if these amendments of the present invention and modification belong to the scope of the claims in the present invention and equivalent technologies thereof Within, then the present invention is also intended to comprise these change and modification.

Claims (15)

1. for the threeway component internal face temperature measurement system of nuclear power station, this threeway component include supervisor and with described master What pipe crossed penetrates pipe, it is characterised in that including:
Fluid information measurement module: for measuring described supervisor and penetrating temperature and the flow rate information of pipe upstream fluid；
Function sets up module: for setting up the master of threeway component internal face temperature of zero dimension and threeway component, penetrating pipe flow speed ratio pass First function of system, with supervisor's fluid temperature (F.T.), penetrate the second function of pipe fluid temperature and internal face temperature relation；
Internal face temperature computation module: respectively with fluid information measurement module, function is set up module and is connected, and is used for receiving fluid letter Cease the described supervisor that measurement module is measured and temperature and the flow rate information of penetrating pipe upstream fluid, call function and set up what module was set up First function and the second function, calculate and obtain described internal face temperature.
2. the threeway component internal face temperature measurement system for nuclear power station as claimed in claim 1, it is characterised in that described Fluid information measurement module includes:
Temperature-measuring module, for measuring supervisor, penetrating pipe upstream relative to the fluid temperature (F.T.) (T of supervisor at stability regiono) and penetrate pipe Fluid temperature (F.T.) (Ti)；
Flow-speed measurement module, is used for measuring supervisor, penetrating pipe upstream relative to being responsible for inlet flow rate (V at stability regiono) and penetrate tube inlet Flow velocity (Vi)。
3. the threeway component internal face temperature measurement system for nuclear power station as claimed in claim 2, it is characterised in that described Function is set up module and is included:
Temperature of zero dimension computing unit, for based on supervisor inlet flow rate (Vo) and penetrate tube inlet flow velocity (Vi) numerical value, calculate flow velocity Ratio (VR), obtains corresponding temperature of zero dimension (m) in conjunction with CFD numerical computations.
4. the threeway component internal face temperature measurement system for nuclear power station as claimed in claim 3, it is characterised in that described The master of threeway component internal face temperature of zero dimension and threeway component, the first function penetrating pipe flow speed ratio relation be:
M=φ × VR,
Wherein, φ is the transmission function of each tired sensitive spot；VR is the master of threeway component, penetrates pipe flow speed ratio, VR=Vi/Vo。
5. the threeway component internal face temperature measurement system for nuclear power station as claimed in claim 4, it is characterised in that described Supervisor's fluid temperature (F.T.), the second function penetrating pipe fluid temperature and internal face temperature relation be:
T=m (Ti-TO)+T0,
Wherein, the internal face temperature of certain point in T is threeway component.
6. as claimed in claim 2 or claim 3 for the threeway component internal face temperature measurement system of nuclear power station, it is characterised in that Described flow-speed measurement module includes:
Ultrasonic flowmeter, the supervisor stiring and make muddy upstream, district being arranged in threeway component, penetrates outside the pipeline of pipe, is used for measuring master Manage, penetrate pipe upstream relative to being responsible for inlet flow rate (V at stability regiono) and penetrate tube inlet flow velocity (Vi)。
7. as claimed in claim 2 or claim 3 for the threeway component internal face temperature measurement system of nuclear power station, it is characterised in that Described temperature-measuring module includes:
Thermocouple, the supervisor stiring and make muddy upstream, district being arranged in threeway component, penetrates outside the pipeline of pipe, is used for measuring supervisor, penetrating Pipe upstream is relative to the fluid temperature (F.T.) (T of supervisor at stability regiono) and penetrate the fluid temperature (F.T.) (T of pipei)。
8. the threeway component internal face temperature measurement system for nuclear power station as claimed in claim 1, it is characterised in that described Internal face temperature computation module includes:
Volume control technique computing unit, is used for using volume control technique, based on the node temperature on threeway component outer wall, intermediate layer Node temperature, the node temperature on inwall, calculate obtain threeway component corresponding point inner wall temperature information.
9. for the threeway component internal face thermometry of nuclear power station, this threeway component include supervisor and with described master What pipe crossed penetrates pipe, it is characterised in that comprise the following steps:
S1, obtain described supervisor and penetrate temperature and the flow rate information of pipe upstream fluid respectively；
S2, set up the master of threeway component internal face temperature of zero dimension and threeway component, jet velocity than the first function of relation respectively, With supervisor's fluid temperature (F.T.), penetrate the second function of pipe fluid temperature and internal face temperature relation；
S3, according to described supervisor with penetrate pipe flow rate information and combine the first function, calculate and obtain described internal face temperature of zero dimension；
The temperature according to described supervisor and penetrating pipe upstream fluid, described internal face temperature of zero dimension and the second function calculate and obtain institute State internal face temperature.
10. the threeway component internal face thermometry for nuclear power station as claimed in claim 9, it is characterised in that institute State step S1 and include sub-step:
S11, measurement are responsible for, are penetrated pipe upstream relative to the rate of flow of fluid (T of supervisor at stability regiono) and penetrate the rate of flow of fluid (T of pipei)；
S12, measurement are responsible for, are penetrated pipe upstream relative to being responsible for inlet temperature (V at stability regiono) and penetrate tube inlet temperature (Vi)。
11. as claimed in claim 10 for the threeway component internal face thermometry of nuclear power station, it is characterised in that institute State step S2 and include sub-step:
S21, based on supervisor inlet flow rate (Vo) and penetrate tube inlet flow velocity (Vi) numerical value, calculate velocity ratio (VR), in conjunction with CFD numerical value Calculate and obtain corresponding temperature of zero dimension (m).
12. as claimed in claim 11 for the threeway component internal face thermometry of nuclear power station, it is characterised in that institute State in step S2:
The master of described threeway component internal face temperature of zero dimension and threeway component, the first function penetrating pipe flow speed ratio relation be:
M=φ × VR
Wherein, φ is the transmission function of each tired sensitive spot；VR is the master of threeway component, penetrates pipe flow speed ratio, VR=Vi/Vo；
Described supervisor's fluid temperature (F.T.), the second function penetrating pipe fluid temperature and internal face temperature relation be:
T=m × (Ti-To)+To
Wherein, the internal face temperature of certain point in T is threeway component.
The 13. threeway component internal face thermometries for nuclear power station as described in claim 10 or 11, its feature exists In, described step S11 includes:
The supervisor stiring and make muddy upstream, district in threeway component, penetrate layout ultrasonic flowmeter outside the pipeline of pipe, measure supervisor, penetrate Pipe upstream is relative to being responsible for inlet flow rate (V at stability regiono) and penetrate tube inlet flow velocity (Vi)。
The 14. threeway component internal face thermometries for nuclear power station as described in claim 10 or 11, its feature exists In, described step S12 includes:
S4, the supervisor stiring and make muddy upstream, district in threeway component, penetrate layout thermocouple outside the pipeline of pipe, measure supervisor, penetrate pipe Upstream is relative to the fluid temperature (F.T.) (T of supervisor at stability regiono) and penetrate the fluid temperature (F.T.) (T of pipei)。
15. as claimed in claim 9 for the threeway component internal face thermometry of nuclear power station, it is characterised in that institute State step S3 and include sub-step:
S31, employing volume control technique, based on the node temperature on threeway component outer wall, the node temperature in intermediate layer, on inwall Node temperature, calculates the inner wall temperature information obtaining threeway component corresponding point.
CN201610025498.6A 2016-01-15 2016-01-15 A kind of threeway component internal face temperature measurement system for nuclear power station and method Pending CN106098123A (en)

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CN112768098A (en) * 2020-12-30 2021-05-07 西安交通大学 Experimental device and method for researching jet impact characteristics of fast reactor core outlet
CN112768098B (en) * 2020-12-30 2022-12-27 西安交通大学 Experimental device and method for researching jet impact characteristics of reactor core outlet of fast reactor

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